Title:
The Influence of Reinforcement on Ultrasonic Pulse Velocity Testing
Author(s):
J.H. Bungey
Publication:
Symposium Paper
Volume:
82
Issue:
Appears on pages(s):
229-246
Keywords:
measurement; nondestructive tests; reinforced concrete;
reinforcing steels; ultrasonic tests.
DOI:
10.14359/6557
Date:
9/1/1984
Abstract:
Embedded reinforcement may have a significant effect on ultrasonic pulse velocity measurements taken through structural concrete members. Reliable corrections are essential if test locations cannot avoid the influence of the steel. Extensive laboratory experimental work demonstrates major shortcomings in all currently accepted allowance procedures and confirms that bar diameter is an essential variable to be incorporated. The effect of bars passing across the pulse path is shown to be less than for bars of similar size running along the path. A correction procedure is proposed which can meet many practical combinations of bar size, bar orientation and concrete properties with significantly greater accuracy than possible by established methods.